TW201638464A - Method for controlling engine starting of a starter and generator device - Google Patents

Abstract

A method for controlling engine starting of a starter and generator device includes: (A) Determines whether starting signal is activated after battery power is turned on, reads crankshaft angle and detection state of decompressor device, if yes then go to next step; (B) Determines whether the decompressor device is turned on, if yes then go to next step; if not then go to step (B1) Determines whether the crank angle is ()~360 degree, if yes then go to next step; if not then go to step (B2) Drives crankshaft rotating reverse in order to open the decompressor device; (C) Drives motor in the forward direction and adds up number of starts then determines whether the engine start success, if yes then go to next step; if not then go to step (C1) Determines the number of driving motor in the forward direction has reached a predetermined number, if yes then stop driving the motor; if not then go to step (B); and (D) Stop driving the motor then goes into power mode.

Description

Start-up and power generation device control engine starting method

The invention relates to a method for starting and controlling a start-up and power generation device control engine, in particular to a method for starting and controlling a start-up and power generation device of a locomotive engine.

At present, an integrated starter and generator (ISG) is used on the market to increase the energy saving effect of the locomotive, and it has the functions of idling and restarting. Generally, when the locomotive is turned off, the stroke will stop before the compression top dead center. At this time, the ISG needs a large torque to overcome the compression pressure of the engine and start the engine.

The method of starting the engine is to reverse the crankshaft to a predetermined position before starting the engine, and then to start the forward rotation to drive the engine to have a greater inertia, thereby overcoming the compression of the top dead center and driving the engine to the appropriate After the ignition speed, the ISG is switched to the charging mode to continuously supply power to the vehicle and to charge the battery.

The above-mentioned conventional ISG architecture implementation method has a disadvantage that it is necessary to accurately invert the crankshaft to the previous compression point before each start, and then add inertia after the rotation to generate a torque sufficient to overcome the compression point, and the engine is The time from start-up to ignition takes a long time and is not ideal. There is still room for improvement.

Because of this, in the spirit of active invention and creation, we have thought of a "method of starting and controlling the start-up of the power generation unit control engine" which can solve the above problems, and finally completed the present invention after several research experiments.

The main object of the present invention is to provide a method for starting and controlling a starter of a power generation device, by using a sensing element for detecting whether a one-way type pressure reducing device is turned on and an angle sensor for detecting a crank angle, not only at the time of starting A one-way decompression device can be used for auxiliary decompression of the engine start, which can reduce the compression pressure of the engine before the compression top dead center, and effectively reduce the torque required for starting, reduce energy consumption; and can make the engine in any situation A shorter time can be used under any crank angle of the starting, which makes the engine start quickly and increases the smoothness of the engine starting.

In order to achieve the above object, the start-up and power generation device of the present invention is assembled on a locomotive having a battery, an electronic control unit (ECU), an engine, a one-way pressure reducing device and a sensing component. The power generating device includes a driving controller, an angle sensor and a motor coupled to one of the crankshafts of the engine; and the method for starting and controlling the engine to start the engine includes:

(A) The power of the battery is turned on, the angle of the crankshaft is read, and the sensing component detects the state of the one-way decompression device, and it is determined whether there is a start signal, and if so, the next step is performed.

(B) determining whether the one-way type pressure reducing device is in an open state, and if so, executing the next step, if not, executing (B1) to determine whether the crank angle is 0 to 360 degrees, and if so, executing the next step, if not, executing (B2) Drive the crankshaft reversal to open the one-way decompression device, and then proceed to the next step.

(C) driving the motor forward rotation, and accumulating the number of starts, judging whether the engine is successfully started, if yes, executing the next step, if not, executing step (C1) to determine whether the cumulative number of starts of the drive motor forward has reached a predetermined number of times If yes, stop driving, if not, repeat step (B).

(D) Stop driving and enter power generation mode.

The predetermined number of starts of the drive motor forward rotation in the above step (C1) may be three times, that is, if the drive motor has been fed forward three times, and the engine has not been started, the drive is stopped, and if not, the process returns to the step ( B) It is judged whether or not the pressure reducing device is in an open state. The predetermined number of times may also be 4 or 5 times or other times. When the stopping of the above step (C1) drives the motor to rotate forward, indicating that the engine is not started for more than a certain number of times and the engine is not normally started, the starting and power generating device no longer drives the motor to rotate forward to avoid starting the power generating device. Damaged.

The locomotive may be provided with a start button and an accelerator activation device. The start signal of the engine refers to one of the following: the start signal transmitted by the electronic control unit, the signal that the start button is pressed, and the throttle activation device are activated. Signal. Wherein, the throttle starting device can be provided for the throttle line A micro switch that activates the micro switch when the throttle line is driven, or a throttle handle that detects whether the throttle handle is rotated, and a micro switch or a throttle handle sensor can be used as the throttle actuating device.

The angle sensor can be a Hall sensor or an encoder to detect the angular position of the crankshaft.

The sensing component includes a magnetic component and a sensing component. The magnetic component is fixed on one of the ejector components of the one-way pressure reducing device, and the sensing component is fixed on a cylinder head cover of the engine. The measuring component can detect the state of the one-way decompression device.

When the power of the battery is turned on, the key of the locomotive is turned on (Key On), and the power of the battery is turned off (Key Off), the starting and generating device can store the angle of the crankshaft, and the step is read in step (A). The angle of the crankshaft can be obtained by detecting the angle of the crankshaft by the angle sensor or directly from the angle of the crankshaft stored by the starting and power generating device.

When the above-mentioned drive motor is rotating forward, if the engine is still unable to smoothly start the engine when the resistance is too high, or the one-way decompression device is not activated and the crankshaft angle is not calculated at the same time (if the key is off, the crankshaft is changed by the external force). Angle, or the situation when the engine did not start the crank angle information at the time of starting, etc.), called the failure mode. At this time, the start-up and power generation device can command to reverse the angle first to make the one-way pressure reducing device first open, and then The drive motor rotates to drive the engine to start.

10‧‧‧Battery

11‧‧‧Start button

12‧‧‧ throttle starter

20‧‧‧Starting and generating unit

21‧‧‧Drive Controller

22‧‧‧ Angle Sensor

23‧‧‧Motor

30‧‧‧ engine

31‧‧‧ crankshaft

32‧‧‧One-way pressure reducing device

33‧‧‧Electronic Control Unit

34‧‧‧Power output shaft

35‧‧‧Transmission gear

36‧‧‧Cylinder head

37‧‧‧Pushing pieces

38‧‧‧Cylinder head cover

39‧‧‧Exhaust valve

40‧‧‧Centrifugal pressure reducing device

50‧‧‧Sensor components

51‧‧‧Magnetic parts

52‧‧‧Inductive parts

A, B, B1, B2, C, C1, D‧‧‧ steps

I, II‧‧‧ area

Fig. 1 is a comparison diagram of the crank angle position and the motor forward rotation resistance of the starting and power generating device.

2 is a cross-sectional view of the engine in accordance with a preferred embodiment of the present invention.

3 is a block diagram of a start-up and power generating device in accordance with a preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of a cylinder head in accordance with a preferred embodiment of the present invention.

FIG. 5 is a structural diagram of a complete vehicle system according to a preferred embodiment of the present invention.

6 is a diagram showing a method of starting a control unit and starting a power generation unit according to a preferred embodiment of the present invention.

The so-called engine pressure reducing device is generally applied to the compression stroke state of the engine piston. Please refer to FIG. 1 for a comparison of the crank angle position and the motor forward rotation resistance of the starting and power generating device. As shown in the figure, the vertical axis coordinate indicates the resistance of the starting and power generating device to rotate forward, and the horizontal axis coordinate indicates the cranking angle. The working principle of the four-stroke engine used in this embodiment is distinguished according to the position of the piston movement in the cylinder, so each 180 degrees to reach the top dead center (TDC) or bottom dead center (BDC) position, and from 0 degrees in each interval are divided into four working strokes of power, exhaust, intake, and compression. Therefore, the primary crankshaft rotates 720 degrees. Wherein, the region I, that is, the crankshaft is located at 0 to 360 degrees, which is a decompression device that is not turned on, but the starting impulse of the starting and power generating device can directly rotate the region of the starting engine, and the region II, that is, the crankshaft is located at 360 to 720 degrees. The position is that the pressure reducing device is not turned on, but the starting impulse of the starting and power generating device cannot be directly started in the forward direction, and the area where the starting pressure reducing device is turned forward and then forwarded is first reversed.

Please refer to FIG. 2 and FIG. 3 , which are respectively a cross-sectional view of an engine and an architecture diagram of a starting and power generating device according to a preferred embodiment of the present invention. At present, an integrated starter and generator (ISG) is used on the market to increase the energy saving effect of the locomotive, and it has the functions of idling and restarting. As shown in FIG. 2, the starter-generator unit 20 is assembled at one end of the power output shaft 34 coupled to the crankshaft 31, and is located at one side end of the crankshaft 31, and the other end of the power output shaft 34 is provided with a shifting speed. Device 35.

As shown in FIG. 3, the start-up and power generating device 20 is electrically connected to the battery 10. The start-up and power generating device 20 includes a drive controller 21, an angle sensor 22, and a motor 23 coupled to the crankshaft 31 of the engine 30. The driving controller 21 can detect information such as the phase sequence and the angular position of the crankshaft 31 of the motor 23 and the engine 30 via the angle sensor 22 . In the present embodiment, the angle sensor 22 is an index-type digital Hall sensor for detecting the electrical angles of the crankshaft 31.

Please refer to FIG. 4 and FIG. 5 , which are respectively a cross-sectional view of a cylinder head and a structural diagram of a complete vehicle system according to a preferred embodiment of the present invention, and FIG. 2 . As shown in FIG. 4, the engine of the embodiment includes: a cylinder head 36, a crankshaft 31, a power output shaft 34, a transmission shifting device 35, a starting and power generating device 20, and a one-way pressure reducing device 32. A cylinder head cover 38, a centrifugal pressure reducing device 40 and a sensing element 50. The cylinder head cover 38 is disposed on the cylinder head 36.

As shown in FIG. 5, the starting and power generating device 20 of the vehicle structure of the embodiment is assembled to have a battery 10, a start button 11, and an electronic device. The control unit 33 (ECU), an accelerator starting device 12, and an engine 30 are mounted on the locomotive, and the engine 30 is provided with a one-way decompression device 32 and a sense of whether the one-way decompression device 32 is turned on. Measuring element 50. That is, the start-up and power generation device 20 is connected to the battery 10, the start button 11, the accelerator starter 12, the electronic control unit 33, and the engine 30.

In the present embodiment, the sensing component 50 is a Hall sensor. The sensing component 50 includes a magnetic component 51 and a sensing component 52. The magnetic component 51 is fixed at one end of the ejector member 37. The engine is mounted on the cylinder head cover 38. The sensing component 50 is connected to the electronic control unit 33 for detecting the position of the ejector member 37 of the unidirectional pressure reducing device 32, thereby determining whether the engine 30 is in a decompressed state. Wherein, the pushing member 37 can be used to push the exhaust valve 39 to open a slight opening, thereby causing the engine 30 to be in a decompressed state. Referring to FIG. 6 , a method for starting a control engine of a start-up and power generation device according to a preferred embodiment of the present invention includes the following steps: Step (A) When the power of the battery 10 is turned on, the angle sensor 22 reads the angle of the crankshaft 31 and After detecting the state of the one-way decompression device 32, the sensing component 50 determines whether there is a start signal, and if so, performs step (B), and if not, returns to the angle sensor 22 in step (A) to read the crankshaft. After the angle of 31 and the sensing component 50 detects the state of the one-way decompression device 32, it is determined whether there is a start signal.

In the present embodiment, the power-on of the battery 10 means that the key of the locomotive is turned on (Key On). In addition, the angle of the crankshaft 31 in the step (A) can be obtained by detecting the angle of the crankshaft 31 by the angle sensor 22 or directly from the angle of the crankshaft 31 stored by the starting and power generating device 20, that is, when the battery 10 is used. When the power is turned off (Key Off), the startup and power generation device 20 of the embodiment The angle data of the crankshaft 31 is stored.

The locomotive set of the embodiment is provided with a start button 11 and a throttle actuating device 12, so the start signal of the engine 30 in the step (A) refers to one of the following: the start signal transmitted by the electronic control unit 33, the start button 11 The signal to be pressed and the signal that the throttle actuating device 12 is activated. The throttle starting device 12 can be provided with a micro switch for the throttle line. When the throttle line is driven, the micro switch is activated, or the throttle handle is provided with a sensor to detect whether the throttle handle is rotated, the micro switch or the throttle A handle sensor can be used as the throttle actuating device 12.

Next, step (B) determines whether the one-way type pressure reducing device 32 is in an open state, and if so, executes step (C), and if not, executes step (B1) to determine whether the angle of the crankshaft 31 is 0 to 360 degrees, and if so, executes the steps. (C), if not, execute step (B2) to drive the crankshaft 31 to reverse to open the one-way pressure reducing device 32, and then perform step (C).

That is, if the one-way type pressure reducing device 32 is in the open state, the starter-generator unit 20 can successfully start the engine 30 regardless of the angle of the crankshaft 31. However, if the one-way type pressure reducing device 32 is in the closed state, the angle of the crankshaft 31 needs to be determined. If the angle of the crankshaft 31 is between 0 and 360 degrees, the one-way type pressure reducing device 32 is in the off state, but the starting point is The starting impulse of the power generating device 20 is still sufficient to overcome the resistance of the forward rotation, so the direct forward rotation can successfully start the engine 30; but if the angle of the crankshaft 31 is between 360 and 720 degrees, and the one-way pressure reducing device 32 is in the closed state, At this time, the starting impulse of the starting and power generating device 20 is insufficient to overcome the resistance of the forward rotation, so the reverse rotation of the one-way decompression device 32 is required to start the engine 30.

Next, in step (C), the drive motor 23 of the power generation device 20 is started to rotate forward, and the number of starts is accumulated, and it is determined whether the engine 30 is successfully started. If yes, step (D) is performed, and if not, step (C1) is performed to determine the total Whether the number of starts has reached a predetermined number of times, if so, the drive is stopped, and if not, step (B) is repeated. In this embodiment, the predetermined number of times is three times, that is, if the driving motor 23 has been accumulatively accumulated three times, and the engine 30 has not been successfully started, the driving is stopped, indicating that there is an abnormality, and stopping the driving can avoid starting and generating electricity. The device 20 is damaged; if not (i.e., less than 3 times accumulated), it is returned to the step (B) to determine whether the one-way decompression device 32 is in an open state.

Next, step (D) stops driving and enters the power generation mode. At this time, it is indicated that the starter-generator unit 20 has successfully driven the engine 30 to start, and can enter the power generation mode.

In this embodiment, by using the sensing component 50 for detecting whether the one-way decompression device 32 is turned on and the angle sensor 22 for detecting the angle of the crankshaft 31, the one-way decompression device 32 can be used not only when the engine 30 is started. The auxiliary decompression of the engine 30 is started, which can reduce the compression pressure of the engine 30 before the top dead center of compression, and effectively reduce the torque required for starting, reduce the energy consumption; and can make the engine 30 in any situation with any crankshaft that is started. A shorter time can be used at 31 angles to allow the engine 30 to start quickly, increasing the rider's smoothness.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

A, B, B1, B2, C, C1, D‧‧‧ steps

Claims (8)

The invention relates to a method for starting a power generation device to control an engine, which is assembled on a locomotive having a battery, an electronic control unit, an engine, a one-way pressure reducing device and a sensing component, including a driving controller, an angle sensor and a motor coupled to one of the crankshafts of the engine; the method for controlling the starting of the engine by the starting and generating device comprises: (A) turning on the power of the battery, reading the angle of the crankshaft and After detecting the state of the one-way decompression device, the sensing component determines whether there is a start signal, and if so, performs the next step; (B) determines whether the one-way decompression device is turned on, and if so, executes In one step, if not, step (B1) is performed to determine whether the crank angle is 0 to 360 degrees. If yes, the next step is performed. If not, step (B2) is executed to drive the crankshaft reversal to open the one-way decompression. The device then performs the next step; (C) drives the motor to rotate forward, and accumulates the number of starts, determines whether the engine is successfully started, and if so, performs the next step, if not, executes step (C1) to determine the Whether the count of the number of starts has reached a predetermined number of times, if drive is stopped, if not then repeating steps (B); and (D) stops the drive to enter the power generation mode. The method of starting the power generation device control engine according to the first aspect of the invention, wherein the predetermined number of times is three times. The method for starting a power generation device control engine according to the first aspect of the invention, wherein the locomotive set is provided with a start button and an accelerator start device, and the start signal of the engine refers to one of the following: the electronic control unit The incoming start signal, the signal that the start button is pressed, and the signal that the throttle activation device is activated. The method for controlling the starting of a starter and a power generating device according to the first aspect of the invention, wherein the angle sensor is a Hall sensor for detecting an angular position of the crankshaft. The method for controlling the start-up and power generation device control engine according to claim 1, wherein the sensing component comprises a magnetic component and a sensing component, and the magnetic component is fixed to one of the one-way pressure reducing device. On the ejector member, the sensing member is fixed to a cylinder head cover of the engine. The method of starting the power generation device control engine according to the first aspect of the patent application, wherein the power on of the battery means that the key of the locomotive is turned on (Key On). The method for starting a power generation device control engine according to the first aspect of the invention, wherein the start and power generation device stores the angle of the crankshaft when the power of the battery is turned off. The method for controlling the starting of a starter and a power generating device according to the seventh aspect of the invention, wherein the step (A) of reading the angle of the crankshaft may be that the angle of the crankshaft is detected by the angle sensor or directly The angle of the crankshaft stored in the starting and power generating device is known.